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Synthesis and photoluminescent properties of a novel copolymer containing Eu-complex moieties and N-vinylcarbazole segments

Paper ID Volume ID Publish Year Pages File Format Full-Text
26647 43969 2013 7 PDF Available
Title
Synthesis and photoluminescent properties of a novel copolymer containing Eu-complex moieties and N-vinylcarbazole segments
Abstract

A novel copolymer containing Eu-complex moieties and N-vinylcarbazole (NVK) segments was synthesized and characterized by FT-IR, elemental analysis, gel permeation chromatography (GPC), differential scanning calorimetry (DSC), thermogravimetric analysis (TGA), cyclic voltammetry (CV), UV–vis absorption spectra and photoluminescence (PL) spectra. The copolymer exhibits a high glass transition temperature (Tg = 203 °C), high thermal decomposition temperature (Td = 345 °C) and good hole-transporting ability (HOMO energy level: −5.38 eV). Particularly, the copolymer shows an interesting photoluminescence (PL) feature: whether in solid state or chloroform solution, the copolymer always emits the characteristic emission of Eu3+ due to the 5D0 → 7FJ (J = 0–4) transitions; besides, the copolymer solution emits the characteristic emission of carbazole and the copolymer solid emits the characteristic emission of metalloquinolate. These phenomenons indicate that the NVK segments are not only used as light-harvesting groups to absorb energy and transfer energy to ligand and then to Eu3+, but also as barrier to form a local microenvironment for Eu-complex moieties. Moreover, the microenvironment was studied by PL emission spectra and Judd-Ofelt analysis, indicating that the introduction of NVK segments increases the polarity and asymmetry of the chemical environment of the europium ion.

Graphical abstractFigure optionsDownload full-size imageDownload as PowerPoint slideHighlights► Synthesis of a copolymer containing Eu-complex and N-vinylcarbazole segments. ► The copolymer exhibits good thermal stability and hole-transporting ability. ► The copolymer emits the characteristic emission of Eu3+. ► N-vinylcarbazole absorb energy and transfer energy to ligand and then to Eu3+. ► N-vinylcarbazole increases the polarity and asymmetry of Eu3+ site.

Keywords
Eu-complex; Copolymer; N-vinylcarbazole; Photoluminescence; Judd-Ofelt analysis
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Synthesis and photoluminescent properties of a novel copolymer containing Eu-complex moieties and N-vinylcarbazole segments
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Publisher
Database: Elsevier - ScienceDirect
Journal: Journal of Photochemistry and Photobiology A: Chemistry - Volume 252, 15 January 2013, Pages 93–99
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us